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Spectra OS5331 Oxygen Sensor - Downstream
| Brand | Spectra OS5331 |
|---|---|
| Position | Downstream |
| Fits | Saab, Scion, Subaru, and Toyota · 68 vehicles |
OE-style replacement. Engineered to meet or exceed original equipment performance.
Downstream sensor. Supports exhaust monitoring after the catalytic converter.
Broad fitment coverage. Covers multiple Subaru, Scion, Toyota, and Saab applications.
Cross-references BBB Industries 13538, Bosch 15009 and Bosch 15025 for the same application. See all 71.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Product Overview
The Spectra OS5331 oxygen sensor is built for downstream applications and direct replacement use across a wide range of Subaru, Scion, Toyota, and Saab vehicles. It is engineered to match original equipment performance for accurate exhaust monitoring and emissions system operation.
Fits 2013-2018 Subaru BRZ, downstream. Fits 2017-2018 Toyota 86, downstream. Fits 2013-2017 Subaru WRX STI, downstream. Fits 2013-2014 Scion FR-S, downstream. Fits 2008-2014 Subaru Impreza, downstream. Fits 2008-2012 Subaru Legacy, downstream. Fits 2008-2012 Subaru Outback, downstream. Fits 2008-2010 Subaru Forester, downstream. Fits 2004-2007 Subaru Forester, downstream. Fits 2002-2007 Subaru Impreza, downstream. Fits 2005-2007 Subaru Legacy, downstream. Fits 2001-2007 Subaru Outback, downstream. Fits 2005-2006 Saab 9-2X, downstream. Fits 2004-2006 Subaru Baja, downstream. Fits 2005 Subaru Legacy, downstream. Fits 2005 Subaru Outback, downstream. Fits 2004 Subaru Legacy, downstream. Fits 2004 Subaru Outback, downstream.
- Downstream oxygen sensor for emissions monitoring after the catalytic converter.
- OE-style replacement engineered to meet or exceed original equipment performance.
- Fits a broad range of Subaru, Scion, Toyota, and Saab applications.
- Part number OS5331 for easy identification and ordering.
Detailed Description
Spectra OS5331 is a downstream oxygen sensor designed for vehicles that use Bank 1 Sensor 2 monitoring. In Subaru applications such as the BRZ, WRX STI, Impreza, Legacy, Outback, Forester, and Baja, as well as the Scion FR-S, Toyota 86, and Saab 9-2X, this sensor supports exhaust feedback after the catalytic converter. The OS5331 is intended for direct replacement service where accurate sensor response is needed to maintain proper emissions system operation. This part cross-references Bosch (e.g., 15009, 15025) for the same application.
Common Uses
- Replacing a failed downstream oxygen sensor.
- Addressing check engine light concerns related to oxygen sensor performance.
- Restoring proper Bank 1 Sensor 2 exhaust monitoring.
- Correcting emissions-related drivability or inspection issues tied to sensor output.
Installation Notes
Verify the vehicle uses a downstream Bank 1 Sensor 2 oxygen sensor before ordering. Confirm connector style, harness routing, and emissions configuration against the original part and vehicle service information. The fitment data includes California and Federal emissions notes for select 2004-2005 Subaru Legacy and Outback applications, so those details should be matched carefully during installation.
Quality Assurance
Spectra Premium states that its engineering, manufacturing technology, and quality control processes are used to produce oxygen sensors that meet or exceed original equipment performance.
| Year | Make | Model | Transmission | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2018 | Subaru | BRZ | — | 2.0L | H4 | Downstream | Compatible with Bank 1 Sensor 2 Oxygen Sensor. |
| 2018 | Toyota | 86 | — | 2.0L | H4 | Downstream | Compatible with Bank 1 Sensor 2 Oxygen Sensor. |
| 2017 | Subaru | BRZ | — | 2.0L | H4 | Downstream | Compatible with Bank 1 Sensor 2 Oxygen Sensor. |
| 2017 | Subaru | WRX STI | — | 2.5L | H4 | Downstream | Compatible with Bank 1 Sensor 2 Oxygen Sensor. |
| 2017 | Toyota | 86 | — | 2.0L | H4 | Downstream | Compatible with Bank 1 Sensor 2 Oxygen Sensor. |
| 2016 | Subaru | BRZ | — | 2.0L | H4 | Downstream | Compatible with Bank 1 Sensor 2 Oxygen Sensor. |
| 2016 | Subaru | WRX STI | — | 2.5L | H4 | Downstream | Compatible with Bank 1 Sensor 2 Oxygen Sensor. |
| 2015 | Subaru | BRZ | — | 2.0L | H4 | Downstream | Compatible with Bank 1 Sensor 2 Oxygen Sensor. |
| 2015 | Subaru | WRX STI | — | 2.5L | H4 | Downstream | Compatible with Bank 1 Sensor 2 Oxygen Sensor. |
| 2014 | Scion | FR-S | — | 2.0L | H4 | Downstream | Compatible with Bank 1 Sensor 2 Oxygen Sensor. |
| 2014 | Subaru | BRZ | — | 2.0L | H4 | Downstream | Compatible with Bank 1 Sensor 2 Oxygen Sensor. |
| 2014 | Subaru | Impreza | — | 2.5L | H4 | Downstream | Compatible with Bank 1 Sensor 2 Oxygen Sensor. |
| 2014 | Subaru | WRX STI | — | 2.5L | H4 | Downstream | Compatible with Bank 1 Sensor 2 Oxygen Sensor. |
| 2013 | Scion | FR-S | — | 2.0L | H4 | Downstream | Compatible with Bank 1 Sensor 2 Oxygen Sensor. |
| 2013 | Subaru | BRZ | — | 2.0L | H4 | Downstream | Compatible with Bank 1 Sensor 2 Oxygen Sensor. |
| 2013 | Subaru | Impreza | — | 2.5L | H4 | Downstream | Compatible with Bank 1 Sensor 2 Oxygen Sensor. |
| 2013 | Subaru | WRX STI | — | 2.5L | H4 | Downstream | Compatible with Bank 1 Sensor 2 Oxygen Sensor. |
| 2012 | Subaru | Impreza | — | 2.5L | H4 | Downstream | Compatible with Bank 1 Sensor 2 Oxygen Sensor. |
| 2012 | Subaru | Legacy | — | 2.5L | H4 | Downstream | Compatible with Bank 1 Sensor 2 Oxygen Sensor. |
| 2012 | Subaru | Outback | — | 2.5L | H4 | Downstream | Compatible with Bank 1 Sensor 2 Oxygen Sensor. |
| 2011 | Subaru | Impreza | — | 2.5L | H4 | Downstream | Compatible with Bank 1 Sensor 2 Oxygen Sensor. |
| 2011 | Subaru | Legacy | — | 2.5L | H4 | Downstream | Compatible with Bank 1 Sensor 2 Oxygen Sensor. |
| 2011 | Subaru | Outback | — | 2.5L | H4 | Downstream | Compatible with Bank 1 Sensor 2 Oxygen Sensor. |
| 2010 | Subaru | Forester | — | 2.5L | H4 | Downstream | Compatible with Bank 1 Sensor 2 Oxygen Sensor. |
| 2010 | Subaru | Impreza | — | 2.5L | H4 | Downstream | Compatible with Bank 1 Sensor 2 Oxygen Sensor. |
| 2010 | Subaru | Legacy | — | 2.5L | H4 | Downstream | Compatible with Bank 1 Sensor 2 Oxygen Sensor. |
| 2010 | Subaru | Outback | — | 2.5L | H4 | Downstream | Compatible with Bank 1 Sensor 2 Oxygen Sensor. |
| 2009 | Subaru | Forester | — | 2.5L | H4 | Downstream | Compatible with Bank 1 Sensor 2 Oxygen Sensor. |
| 2009 | Subaru | Impreza | — | 2.5L | H4 | Downstream | Compatible with Bank 1 Sensor 2 Oxygen Sensor. |
| 2009 | Subaru | Legacy | — | 2.5L | H4 | Downstream | Compatible with Bank 1 Sensor 2 Oxygen Sensor. |
| 2009 | Subaru | Outback | — | 2.5L | H4 | Downstream | Compatible with Bank 1 Sensor 2 Oxygen Sensor. |
| 2008 | Subaru | Forester | — | 2.5L | H4 | Downstream | Compatible with Bank 1 Sensor 2 Oxygen Sensor. |
| 2008 | Subaru | Impreza | — | 2.5L | H4 | Downstream | Compatible with Bank 1 Sensor 2 Oxygen Sensor. |
| 2008 | Subaru | Legacy | — | 2.5L | H4 | Downstream | Compatible with Bank 1 Sensor 2 Oxygen Sensor. |
| 2008 | Subaru | Outback | — | 2.5L | H4 | Downstream | Compatible with Bank 1 Sensor 2 Oxygen Sensor. |
| 2007 | Subaru | Forester | — | 2.5L | H4 | Downstream | — |
| 2007 | Subaru | Impreza | — | 2.5L | H4 | Downstream | — |
| 2007 | Subaru | Legacy | — | 2.5L | H4 | Downstream | — |
| 2007 | Subaru | Outback | — | 2.5L | H4 | Downstream | — |
| 2006 | Saab | 9-2X | — | 2.5L | H4 | Downstream | — |
| 2006 | Subaru | Baja | — | 2.5L | H4 | Downstream | — |
| 2006 | Subaru | Forester | — | 2.5L | H4 | Downstream | — |
| 2006 | Subaru | Impreza | — | 2.5L | H4 | Downstream | — |
| 2006 | Subaru | Legacy | — | 2.5L | H4 | Downstream | — |
| 2006 | Subaru | Outback | — | 2.5L | H4 | Downstream | — |
| 2005 | Saab | 9-2X | — | 2.5L | H4 | Downstream | — |
| 2005 | Saab | 9-2X | — | 2.0L | H4 | Downstream | — |
| 2005 | Subaru | Baja | — | 2.5L | H4 | Downstream | — |
| 2005 | Subaru | Forester | — | 2.5L | H4 | Downstream | — |
| 2005 | Subaru | Impreza | — | 2.5L | H4 | Downstream | — |
| 2005 | Subaru | Impreza | — | 2.0L | H4 | Downstream | — |
| 2005 | Subaru | Legacy | — | 2.5L | H4 | Downstream | — |
| 2005 | Subaru | Legacy | — | 2.5L | H4 | Downstream | Located After Primary Catalytic Converter; w/ California Emissions; Located After Secondary Catalytic Converter; w/ California Emissions; w/ Federal Emissions |
| 2005 | Subaru | Outback | Manual | 2.5L | H4 | Downstream | — |
| 2005 | Subaru | Outback | Automatic | 2.5L | H4 | Downstream | — |
| 2005 | Subaru | Outback | — | 2.5L | H4 | Downstream | Located After Primary Catalytic Converter; w/ California Emissions; Located After Secondary Catalytic Converter; w/ California Emissions; w/ Federal Emissions |
| 2004 | Subaru | Baja | — | 2.5L | H4 | Downstream | — |
| 2004 | Subaru | Forester | — | 2.5L | H4 | Downstream | — |
| 2004 | Subaru | Impreza | — | 2.5L | H4 | Downstream | — |
| 2004 | Subaru | Impreza | — | 2.0L | H4 | Downstream | — |
| 2004 | Subaru | Legacy | — | 2.5L | H4 | Downstream | Located After Primary Catalytic Converter; w/ California Emissions; Located After Secondary Catalytic Converter; w/ California Emissions |
| 2004 | Subaru | Outback | — | 3.0L | H6 | Downstream | — |
| 2004 | Subaru | Outback | — | 2.5L | H4 | Downstream | Located After Manifold Primary Catalytic Converter; w/ California Emissions; Located After Secondary Catalytic Converter; w/ California Emissions; Located After Right Manifold Primary Catalytic Converter; w/ California Emissions; Located After Left Manifold Primary Catalytic Converter; w/ California Emissions |
| 2003 | Subaru | Impreza | — | 2.0L | H4 | Downstream | — |
| 2003 | Subaru | Outback | — | 3.0L | H6 | Downstream | — |
| 2002 | Subaru | Impreza | — | 2.0L | H4 | Downstream | — |
| 2002 | Subaru | Outback | — | 3.0L | H6 | Downstream | — |
| 2001 | Subaru | Outback | — | 3.0L | H6 | Downstream | — |
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